commit: a32c88b9386ce3df87f28dd46bdc3776cd6edf75
From: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
Date: Wed, 23 May 2012 12:55:38 -0400
Subject: xen/hvc: Fix error cases around HVM_PARAM_CONSOLE_PFN
We weren't resetting the parameter to be passed in to a
known default. Nor were we checking the return value of
hvm_get_parameter.
CC: sta...@kernel.org
Signed-off-by: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
---
drivers/tty/hvc/hvc_xen.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index afc7fc2..3277f0e 100644
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -219,7 +219,8 @@ static int xen_hvm_console_init(void)
if (r < 0)
goto err;
info->evtchn = v;
- hvm_get_parameter(HVM_PARAM_CONSOLE_PFN, &v);
+ v = 0;
+ r = hvm_get_parameter(HVM_PARAM_CONSOLE_PFN, &v);
if (r < 0)
goto err;
mfn = v;
--
1.7.3.4
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